Sammohana focused on refactoring numerical code in the deanlee/openpilot and sunnypilot/opendbc repositories by replacing the custom numpy_fast module with the official NumPy library. This work involved updating car control modules to use standard NumPy functions, ensuring consistent numerical behavior and reducing dependency complexity. By standardizing APIs and removing legacy tests, Sammohana improved code clarity and maintainability, making future upgrades and onboarding more straightforward. The changes, implemented in Python with an emphasis on dependency management and refactoring, addressed long-term maintenance concerns and enabled more predictable performance in critical modules, though no major bugs were fixed during this period.